In Spider-Man's latest adventure, scientists delve into the field of regenerative medicine as they work to re-grow a human limb. Koudy Williams, D.V.M., a self-described "Spider-Man geek" and real-life regenerative medicine researcher, says the plot of the latest comic book and movie isn't as far-fetched as some people might think. "We're working on long-term projects to regenerate fingers and limbs," says Williams, a professor at Wake Forest Baptist Medical Center's Institute for Regenerative Medicine. "But we have safer ways to do it than the researchers in Spider-Man."